The document discusses dividing fractions. It explains that to divide fractions, you multiply the first fraction by the reciprocal of the second fraction. It provides examples of dividing fractions and solving whole number division problems by changing the whole number to a fraction. Students are instructed to practice dividing fractions through examples in their notes and on a worksheet.

1. 7.4 Dividing Fractions
Mr. Williams
GESD
jwilliams@gesd40.org
Objective: Use reciprocals to divide fractions in
class and on a worksheet.
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2. Vocabulary
5 3
Reciprocal ­ two numbers, whose product is one. (Such as and )
3 5
3
12
12
What is the reciprocal of ?
3
2

3. Warm Up ­ Answer these in your math notes.
1 1 1 5
2
+
8 4
x 6
1 2 3 1
+ 6 4 x 2
12
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4. Dividing Fractions is easy. It is just like multiplying fractions with one more step.
To divide a fraction, multiply by its reciprocal.
2 3 2 4
÷ = x
3 4 3 3 All you do is quot;switchquot; the
second fraction then multiply.
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5. Solve these problems in your math notes.
5 4 5 3
÷ = x
8 3 8 4
7 1 7 2
÷ = x
10 1
10 2
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6. Write a fraction divison problem in your math notes.
We will share some of them on the board.
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7. Dividing Fractions and Whole Numbers
1. Change the whole number into a fraction.
2. Find the reciprocal of your second fraction.
3. Multiply the fractions.
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8. So what does all that mean?
3
Divide 6 by
4
3 6 3 6 4
6 ÷ = = x
4 1 ÷ 4 1 3
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9. Solve these problems in your math notes.
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10 ÷
3 =
2
12 ÷ 3 =
Finish this sentence:
You divide fractions by ...
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